摘要：这篇论文主要是从现在一些地区存在的空间狭窄，地铁区间需要重叠搭建的现状出发，面对在洪湖下方修建隧道所面对的技术难题，研究了地铁区间盾构隧道下穿洪湖施工关键技术现在的研究现状，研究的意义以及叠线区间盾构隧道的施工顺序。考虑到不同的复合地层对盾构掘进的影响，提供了复合地层盾构掘进技术以及下隧道盾构掘进控制参数。在上行隧道的挖掘过程中提供了上行隧道盾构掘进技术，特别是围堰及筑岛填筑施工技术以及先完成的下隧道在上隧道施工中的保护技术，如中间夹层加固技术、下行隧道内部支撑技术。在最后还分析了盾构掘进事故防治措施，主要是针对解决盾尾渗漏、螺旋机防喷涌、隧道上浮、冒顶、坍塌等可能会遇到的问题。72003

毕业论文关键词： 盾构；叠线隧道；复合地层；掘进参数；围堰及筑岛

EngilshAbstract: This paper is mainly from the existing space in some areas is narrow, the subway area needs to overlap the status quo to set up the face of the construction of tunnels in Honghu below the technical problems faced by the subway area shield tunnel under the construction of key technologies The current research status, the significance of the study, and the construction sequence of the shield tunnel。 Considering the influence of different composite strata on shield tunneling, the composite strata tunneling technology and the tunnel tunneling tunneling control parameters are provided。 In the process of excavation of the upstream tunnel, the tunneling technology of the tunnel is provided, especially the construction technology of the cofferdam and the island filling and the protection technology of the tunnel under construction in the tunnel, such as the middle sandwich reinforcement technology, the downstream tunnel Internal support technology。 In the end, it also analyzes the prevention and control measures of shield tunneling accident, which is mainly aimed at solving the problems that may be encountered in solving the leakage of the shield tail, the spooling of the screw machine, the floating, roofing and collapse of the tunnel。

KeyWords: Shield；Stacking tunnel；Composite formation；Tunneling parameters；Cofferdam and island

目  录 

1 工程概况 1

1。1 研究对象工程概述 1

1。2 工程地质 2

1。3 水文地质 6

2 研究意义 6

3 研究现状 8

4 上软下硬地质条件下下隧道施工技术 9

4。1 总体施工顺序 9

4。2 复合地层概念及分类 9

4。2。1 复合地层概念 9

4。2。2 复合地层分类 9

4。3 不同的复合地层对盾构掘进的影响 10

4。3。1 以第四系砂层为主与风化岩层的组合 10

4。3。2 残积粘土层夹砂质或砂砾质粘性土 10

4。3。3 以全风化和强风化地层为主的组合 10

4。4 复合地层盾构掘进技术 11

4。4。1 盾构掘进模式选择 11

4。4。2 盾构配置调整 11

4。4。3 掘进参数调整 11

4。4。4 辅助工法的利用